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"The trend that we're seeing is that the city is moving out more and more and more. I think that's something we really need to watch," she said.

"[It would be] great if it was supported with good transport links and good amenities as these new communities develop but I do think there will come a stage where we really have to start the debate as to what happens within the city limits and I think that's a debate that all stakeholders have to get involved in."